Abstract
The use of polymer-coated potassium fertilizers may reduce the leaching of potassium (K) in the soil, increasing the availability of this nutrient to plants for a long period. In this context, the residual effect of doses and sources of potassium chloride (KCl) application on K nutrition, production components and corn grain yield in two sequential crops were investigated in this study. The experiment was conducted in a clayey Oxisol. The experiment was arranged in a randomized complete block design with four replicates in a 4 4 factorial scheme: four potassium doses (0, 40, 80 and 120 kg ha -1 of K 2 O) and four KCl sources [uncoated fertilizer (conventional) and three sources of fertilizer coated with different polymers]. The KCl sources showed the same residual effect for most production components, leaf K content and corn grain yield in both crops. The increase of K fertilizer doses in the previous crop provided residual effect on the second-harvest corn crop, resulting in linear increase in leaf K content, weight of 100 grains and grain yield up to the dose of 77 kg ha -1 , whit the use of any source of KCl.
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Claims 2
Claim · model-written summary
Polymer-coated KCl sources showed the same residual effect as conventional KCl for most production components, leaf K content and corn grain yield.
- Taxon
- corn
Zea mays subsp. mayse3 - Treatment
- KCl sourcese1
- Outcome
- production components, leaf K content and corn grain yielde1
- Direction
- same residual effecte1
- Comparator
- uncoated fertilizer (conventional)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The KCl sources showed the same residual effect for most production components, leaf K content and corn grain yield in both crops”
e2“four KCl sources [uncoated fertilizer (conventional) and three sources of fertilizer coated with different polymers]”
e3“the residual effect of doses and sources of potassium chloride (KCl) application on K nutrition, production components and corn grain yield in two sequential crops were investigated”
Claim · model-written summary
Increasing K fertilizer doses in the previous crop increased leaf K content, 100-grain weight and corn grain yield linearly up to 77 kg ha -1.
- Taxon
- cornZea mays subsp. mayse4
- Treatment
- The increase of K fertilizer doses in the previous crope4
- Outcome
- leaf K content, weight of 100 grains and grain yielde4
- Direction
- linear increasee4
- Value
- 77 kg ha -1e4
- Qualifier
- the use of any source of KCle4
- Setting
- clayey Oxisole5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The increase of K fertilizer doses in the previous crop provided residual effect on the second-harvest corn crop, resulting in linear increase in leaf K content, weight of 100 grains and grain yield up to the dose of 77 kg ha -1 , whit the use of any source of KCl”
e5“The experiment was conducted in a clayey Oxisol”
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